A sales tax permit, also called a seller’s permit or certificate of registration, authorises a business to collect, report, and remit sales tax to state and local tax authorities.
It is required for businesses that sell taxable goods or services in a state where they have a collection obligation. Online sellers may need permits in multiple states when they have physical or economic nexus.
What does a sales tax permit do?
A permit:
- authorises legal sales tax collection;
- supports reporting and remittance;
- helps a business comply with state and local tax laws;
- may allow tax-free inventory purchases through a resale certificate; and
- provides a registration record for future filings and verification.
Operating without a required permit can lead to penalties, interest, back taxes, and audits.
When does a business need one?
You may need a permit when you:
- sell taxable goods or services in a state with sales tax;
- exceed an economic nexus threshold;
- operate a store, pop-up shop, or temporary event;
- employ people or hold inventory in the state; or
- purchase inventory for resale and suppliers require registration evidence.
Requirements, thresholds, fees, and renewal rules vary by state.
How to register
1. Determine whether registration is required
Review physical presence, economic activity, products, and the state’s current nexus rules.
2. Gather business information
Prepare the legal business name and structure, EIN or other taxpayer identification, owner information, address, contact details, expected sales volume, and the goods or services you sell.
3. Visit the state tax authority
Apply through the state Department of Revenue or equivalent agency. Texas, California, and Florida each use their own tax authority and application process.
4. Complete the application
Provide ownership, business activity, estimated sales, and nexus information. Some states may request industry or supplier details.
5. Pay applicable fees
Some states issue permits without a registration fee, while others charge a one-time or recurring fee.
6. Receive the permit
After approval, the state provides a permit or seller’s permit number. Processing can be immediate or take several weeks.
What to do after approval
Update the ecommerce, POS, billing, or marketplace systems that collect tax. If you sell in several states, use a compliance workflow that keeps registrations and collection settings aligned.
Also confirm the filing schedule assigned by each state. Returns may be monthly, quarterly, or annual depending on sales volume and state requirements. Track collections and remit payments on time. Our step-by-step guides show how to file sales tax online in California, Texas, and Florida.
How to verify a permit
When accepting a permit or resale certificate, collect the business name, permit number, issuing state, and address where available. Use the state tax authority’s official lookup or contact the agency if the online tool is unavailable.
Review whether the permit is active, confirm the business details match, and save the verification record with the transaction or customer file. Verification helps reduce fraud and the risk of accepting an invalid exemption.
Permit versus resale certificate
A sales tax permit authorises a business to collect and remit tax from customers. A resale certificate allows a business to purchase inventory for resale without paying tax at the time of purchase.
The documents serve different purposes. A permit may be required before a business can issue or use a resale certificate, and a resale certificate should only be used for goods genuinely intended for resale.
Kintsugi helps businesses monitor nexus, calculate accurate tax, and manage the collection and filing workflow after they register.
